12228865 has 48 divisors (see below), whose sum is σ = 18098640. Its totient is φ = 7884800.

The previous prime is 12228859. The next prime is 12228869. The reversal of 12228865 is 56882221.

It can be written as a sum of positive squares in 8 ways, for example, as 450241 + 11778624 = 671^2 + 3432^2 .

It is not a de Polignac number, because 12228865 - 2³ = 12228857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12228865.

It is not an unprimeable number, because it can be changed into a prime (12228869) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 298245 + ... + 298285.

It is an arithmetic number, because the mean of its divisors is an integer number (377055).

Almost surely, 2^12228865 is an apocalyptic number.

It is an amenable number.

12228865 is a deficient number, since it is larger than the sum of its proper divisors (5869775).

12228865 is a wasteful number, since it uses less digits than its factorization.

12228865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 103 counting only the distinct ones).

The product of its digits is 15360, while the sum is 34.

The square root of 12228865 is about 3496.9794108630. The cubic root of 12228865 is about 230.3891647204.

The spelling of 12228865 in words is "twelve million, two hundred twenty-eight thousand, eight hundred sixty-five".